Calendar electronic timepiece

Details Calendar electronic timepiece Calendar electronic timepiece

1998-04-24

2000-07-11

Miska, Vit

Horology: time measuring systems or devices

With calendar indicator

368 37, G04B 1924, G04B 1920

Patent

active

060883006

ABSTRACT:
A calendar electronic timepiece comprises a signal generating circuit for generating a date signal, a driving circuit for outputting a driving signal in accordance with the date signal generated by the signal generating circuit, and an ultrasonic motor driven by the driving signal outputted by the driving circuit. The ultrasonic motor is comprised of a piezoelectric vibrator having an electrode pattern and being driven by the driving signal outputted from the driving circuit to undergo expansion and contraction movement, a vibrating member connected to the piezoelectric vibrator and vibrationally driven by expansion and contraction movement of the piezoelectric vibrator, and a date dial disposed on the vibrating member to be frictionally driven by expansion and contraction movement of the piezoelectric vibrator.

REFERENCES:
patent: 4060976 (1977-12-01), Jakob
patent: 4198808 (1980-04-01), Tamaru
patent: 4271494 (1981-06-01), Miyazaki
patent: 5274614 (1993-12-01), Yamazaki

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